Observation of Anomalous Propagation of Radio Waves in the MW Band

I began to investigate this strange phenomenon. It was found that during the anomalous propagation on the MW, I could perfectly receive the VE3UBL/B beacon. The beacon operates in the 6 meter band at 50.059 MHz, and located 87 km away from my house. The beacon operates on a turnstile antenna and has the 8 watts power. I usually hear this beacon with S1 level. But when anomalous propagation on the MW is present, I hear this beacon with S 2- S4. I used to an ICOM IC-7410 on the 6- meter band.

I decided to check the propagation of other radio stations on the MW band at the time when WTVN Radio jammed the CKTB Radio. I checked frequencies from 610 to 680 kHz where I usually received only three radio station. It is CKTB (610- kHz), CFMJ (640- kHz) and CFTR (680- kHz). It was found that at the time I may receive two new radio stations. First was WEJL Radio, Pennsylvania, which is located at 350 km away from me and has power of 2 kW. The second one was CFCO Radio, Chatham, Ontario. This radio station has power of 10 kW and is located 320 km from Niagara Falls. The radio stations I received on my auto car radio receiver. On the road to work I heard both of these radios with varying success. However in anomalous areas where WTVN Radio jammed the CKTB Radio, these radios were received very loud.

Picture 7 VE3UBL/B Beacon

Picture 8 WEJL 630 kHz Radio

Picture 9 CFCO 670 kHz Radio

Existing of the anomalous reception of radio stations at the MW band occurs at some conditions. Usually it happens from November to March. The strongest anomalous propagation occurs from December to January. Very good anomalous propagation occurs in the fog, light snowfall, light rain. Super Moon, meteor showers, flares on the sun- these circumstances affected the anomalous propagation in good side.

Usually, the anomalous propagation exits when the air temperature is from plus 5 to minus 10 C degrees (or 41 to 14 F). When it is very cold (more than minus 10 C (14 F) - minus 15 C (5 F) degrees) the anomalous propagation usually is absence. The anomalous propagation usually not exits at temperatures above plus 10 C degree (50 F). So it is finished at warm weather- in spring and summer time.

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